Indonesia's ongoing wildfires are projected to generate greenhouse gas emissions equivalent to the worst fire year recorded this century, driven by intensifying drought conditions linked to El Niño weather patterns.
Fires currently sweeping across Indonesian peatlands and forests show emissions trajectories matching or exceeding the devastating 2015 fire season, which released roughly 1.6 billion tonnes of carbon dioxide equivalent into the atmosphere. That year ranks among the most severe fire-driven emission events in modern records, with impacts felt across Southeast Asia through air quality crises and regional haze.
Peatland combustion drives the severity. Indonesia contains approximately 13 percent of the world's tropical peatlands, concentrated on Sumatra and Borneo. When these water-logged ecosystems burn, they release carbon accumulated over centuries. A single hectare of burning peatland emits far more carbon than equivalent forest area because the fires consume the soil itself, not just surface vegetation.
El Niño conditions exacerbate the risk. The climate oscillation pushes the Western Pacific toward warmer sea surface temperatures while reducing rainfall across Indonesia and neighboring regions. Extended dry seasons create conditions where fires spread faster and burn deeper into peatland reserves. Climate change appears to be intensifying El Niño's drought impacts, extending fire seasons and broadening affected areas.
The 2015 event demonstrated the scale of this vulnerability. Researchers documented emissions ranging from 1.0 to 1.6 gigatonnes of CO2 equivalent across various studies, making that single season comparable to annual carbon outputs from major industrial nations. The fires triggered respiratory health crises across Indonesia, Malaysia, and Singapore, with air quality indices reaching hazardous levels for weeks.
Current fire activity follows similar patterns. Satellite imagery documents active fire perimeters expanding across Central Kalimantan, East Kalimantan, and Riau provinces. Agricultural clearing operations combined with natural ignition sources have ignited peatland margins where development and land use change have drained protective water tables.
Indonesia's peatland area has contracted sharply since 2000. Logging, palm oil plantations, and rice agriculture have drained roughly half of the nation's original peatland extent. Drained peatlands become tinderboxes. They oxidize continuously even without fire, releasing stored carbon. When fires ignite, these degraded ecosystems burn with minimal resistance.
Emissions trajectories depend on fire duration and intensity through December. If El Niño drought conditions persist through the typical December-February wet season transition, emissions will accumulate further. Indonesia's meteorological agency monitors rainfall forecasts to predict fire trajectory.
The emissions stakes extend globally. These fire-driven carbon releases ripple through atmospheric measurements and carbon accounting frameworks. Nations report peatland fires separately under United Nations climate reporting protocols because episodic fire emissions create volatile year-to-year variations that obscure baseline emission trends. Indonesia's total reported emissions fluctuate by billions of tonnes depending on fire years.
Mitigation options exist but require rapid implementation. Peatland rewetting programs restore water tables and reduce combustibility. Indonesia established a peatland restoration agency in 2016 but faces capacity and funding constraints. Early warning systems and fire suppression resources remain underfunded relative to fire risk.
The 2026 projection underscores a hard climate reality. Tropical fire systems amplify both climate change impacts and emissions feedback loops simultaneously. Each severe fire year becomes a baseline for the next event.